Temple Medallions dissapear when medallion inventory is full.

Just killed the Lv. 75+ Architect and when clicking the medallion I was not given a prompt that my medallion inventory was full and it just disappeared.

Previously I had been given a prompt that I could not collect any more medallions, as I was full, but this time I was given no such message and it was not added to my medallions even after exiting and then returning to the temple.

I am still 0/12 for my energized crystals and my temple was reset after the run.

Same.
Xopec medallion or whatever its name is, dropped from architect, Alva appeared to take it, and it's gone. No +1 medallion slot for me

+1 for this report. I keep accidentally clicking the medallions and they just vanish when you are already full, this does not feel intentional

Nope it does not, it feels aweful.